libpledge 0.1.0

libpledge is a library that provides similar functionality to the OpenBSD pledge(2) functionality for Rust programs on Linux.
Documentation 
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/*
 * Copyright © 2022, Steve Smith <tarkasteve@gmail.com>
 *
 * Permission to use, copy, modify, and/or distribute this software for
 * any purpose with or without fee is hereby granted, provided that the
 * above copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
 * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
 * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
 * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
 * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

use std::result;
use thiserror::Error;
use bpfvm;
use crate::promises::Promise;

#[derive(Debug, Error)]
pub enum Error {
    #[error("Promise {0:?} is not implemented.")]
    UndefinedPromise(Promise),
    #[error(transparent)]
    SysErr(#[from] std::io::Error),
    #[error(transparent)]
    BPFErr(#[from] bpfvm::Error),
}

pub type Result<T> = result::Result<T, Error>;